Experimental and numerical analysis of strain rate dependent on material behaviour of glass fibre reinforced polypropylene
Werner A. Hufenbach, Christoph Ebert, Albert Langkamp, Andreas Hornig
Quarterly No. 3, 2011 pages 264-267
DOI:
keywords: glass fibre reinforced polypropylene, strain rate, high speed material testing, constitutive modelling
abstract This paper describes the research work to characterise the strain rate dependent on the deformation and failure behavior of glass fibre reinforced polypropylene. The experimental and theoretical analysis of the mechanical behaviour under highly dynamic loading is performed within the German DFG research project “Textile reinforced composite components for function integrating multi material design in complex lightweight applications”. The investigations are used for the development of novel material models for the strain rate dependent on material behaviour under in-plane and out-off-plane loads. Therefore, highly dynamic tensile and compression tests on textile reinforced composites with a thermoplastic matrix and woven or knitted fabric reinforcement are performed for determination of the strain rate, orientation dependent stiffness, strength characteristics, as well as for identification of the material specific failure and damage behaviour. Within the research work, novel testing methods and devices were developed, which enable a defined loading and accurate strain and damage analysis. Based on the experimental results, approaches for extended material models were developed, which include the strain rate dependent deformation behaviour on the one hand and the fracture mode specific failure behaviour on the other hand.